You spent your OWN money, instead of throwing them into the family grocery cart? Actually, if I’d been shopping alone with my Dad, I would have been too embarrassed, at least in my early teens.
My dad did all the grocery shopping when I ws in my early teens. By the time I was doing most of the shopping I had long learned to buy that kind of stuff when it was on sale, which did not always coincide with the family shopping cart.........which I was stocking, but dad was transporting (and paying for).